import { Cartographic } from "../../Source/Cesium.js";
import { CesiumTerrainProvider } from "../../Source/Cesium.js";
import { createWorldTerrain } from "../../Source/Cesium.js";
import { sampleTerrain } from "../../Source/Cesium.js";

describe("Core/sampleTerrain", function () {
  var worldTerrain;
  beforeAll(function () {
    worldTerrain = createWorldTerrain();
    return worldTerrain.readyPromise;
  });

  it("queries heights", function () {
    var positions = [
      Cartographic.fromDegrees(86.925145, 27.988257),
      Cartographic.fromDegrees(87.0, 28.0),
    ];

    return sampleTerrain(worldTerrain, 11, positions).then(function (
      passedPositions
    ) {
      expect(passedPositions).toBe(positions);
      expect(positions[0].height).toBeGreaterThan(5000);
      expect(positions[0].height).toBeLessThan(10000);
      expect(positions[1].height).toBeGreaterThan(5000);
      expect(positions[1].height).toBeLessThan(10000);
    });
  });

  it("queries heights from Small Terrain", function () {
    var terrainProvider = new CesiumTerrainProvider({
      url: "https://s3.amazonaws.com/cesiumjs/smallTerrain",
    });

    var positions = [
      Cartographic.fromDegrees(86.925145, 27.988257),
      Cartographic.fromDegrees(87.0, 28.0),
    ];

    return sampleTerrain(terrainProvider, 11, positions).then(function (
      passedPositions
    ) {
      expect(passedPositions).toBe(positions);
      expect(positions[0].height).toBeGreaterThan(5000);
      expect(positions[0].height).toBeLessThan(10000);
      expect(positions[1].height).toBeGreaterThan(5000);
      expect(positions[1].height).toBeLessThan(10000);
    });
  });

  it("sets height to undefined if terrain data is not available at the position and specified level", function () {
    var positions = [Cartographic.fromDegrees(0.0, 0.0, 0.0)];

    return sampleTerrain(worldTerrain, 18, positions).then(function () {
      expect(positions[0].height).toBeUndefined();
    });
  });

  it("fills in what it can when given a mix of positions with and without valid tiles", function () {
    var positions = [
      Cartographic.fromDegrees(86.925145, 27.988257),
      Cartographic.fromDegrees(0.0, 89.0, 0.0),
      Cartographic.fromDegrees(87.0, 28.0),
    ];

    return sampleTerrain(worldTerrain, 12, positions).then(function () {
      expect(positions[0].height).toBeGreaterThan(5000);
      expect(positions[0].height).toBeLessThan(10000);
      expect(positions[1].height).toBeUndefined();
      expect(positions[2].height).toBeGreaterThan(5000);
      expect(positions[2].height).toBeLessThan(10000);
    });
  });

  it("requires terrainProvider, level, and positions", function () {
    var positions = [
      Cartographic.fromDegrees(86.925145, 27.988257),
      Cartographic.fromDegrees(0.0, 0.0, 0.0),
      Cartographic.fromDegrees(87.0, 28.0),
    ];

    expect(function () {
      sampleTerrain(undefined, 11, positions);
    }).toThrowDeveloperError();

    expect(function () {
      sampleTerrain(worldTerrain, undefined, positions);
    }).toThrowDeveloperError();

    expect(function () {
      sampleTerrain(worldTerrain, 11, undefined);
    }).toThrowDeveloperError();
  });

  it("works for a dodgy point right near the edge of a tile", function () {
    var positions = [new Cartographic(0.33179290856829535, 0.7363107781851078)];

    return sampleTerrain(worldTerrain, 12, positions).then(function () {
      expect(positions[0].height).toBeDefined();
    });
  });
});
